The partnership will allow GMC and Chevy to introduce heavy-duty pickups and full-size vans with compressed natural gas (CNG) and liquid petroleum gas (LPG) engines in early 2017. The announcement came shortly after the two automakers chose PSI as their preferred upfitter for CNG- and LPG-capable trucks.

GM will supply GMC and Chevy vehicles to PSI, who will fit the vehicles with the LPG or CNG fuel system and then ship the finished trucks and vans directly to dealerships. GM has been expanding its green lineup for years through vehicles like the Chevy Volt and Bolt EV as well as alternative fuel options. Now, expanding the Chevy and GMC fleet options lets them reduce fuel consumption and costs while providing a range of choices for fleet managers, who have different needs.

The US Department of Transportation also announced in December that it will designate a national network of alternative fuel corridors across 55 routes in 35 states. The network will be almost 85,000 miles long and will continue to expand as electric, hydrogen, and other fuel sources are popularized.